Ultra High Performance Concrete: Mix design and practical applications

Evaluating two interesting applications for UHPC, cladding panels and overlays, this project focused on some relevant aspects such as the mix design of UHPC, the shrinkage at early age, the fiber reinforce- ment and the flexural behaviour.As far as mix design concerns, the research optimized the choice of admixtures, (micro)fillers and the aggregate grading, obtaining a compressive strength between 125 and 180N/mm 2 and excellent flexural behavior with the cocktail of micro- and macrofibers. Both restrained and unrestrained shrink- age have been evaluated, and the results seem not to limit the applications. Two practical applications have been studied and show the potential of this material: thin and large cladding panels with different types of rein- forcement, together with new anchorage systems. Secondly, UHPC-overlays for old and new concrete elements seem to be an innovative solution for concrete surfaces exposed to wear or aggressive substances. Modeling and real-scale experiments have been compared for this application.